No RSSI from FC on MWOSD 1.7

I use a Micro MinimOSD on my Revo board. OSD is on MWOSD 1.7 und protocol is MSP. Everything is working but can´t get any RSSI info from FC. In OSD GUI I choose "use FC Data" for RSSI but is 99% without any change.

Rssi from the fc is frame signal count, it tell you how many data/signal frames from Rx it has received, when your signal drops out your frames drop.For true rssi you need to connect the rssi to minmosd not to FC, i think the Devs are working allowing rssi signal wire from the RX to connect to FC.